defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Permutations and Combinations

The number of solutions of x₁ + x₂ + x₃ + x₄ = 30 (x₁, x₂, x₃, x₄ being odd natural numbers) is

1

420

2

560

3

750

4

1024

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